Data replication enables controlled migration of production services from a primary cluster to a secondary cluster either in the event of a disaster or as part of a planned procedure. Data is continuously replicated from the primary cluster to the secondary cluster either synchronously or asynchronously, or a combination of both, depending on the recover point objectives of the application services that are supported by the clusters.
The Geographic Edition framework supports the following software for data replication:
Availability Suite feature of Oracle Solaris
EMC Symmetrix Remote Data Facility software
MySQL software
Oracle Data Guard software, where the Oracle database is running on a local Oracle Solaris Cluster node or on a remote system that is not running Oracle Solaris Cluster software
Oracle ZFS Storage Appliance from Oracle
Geographic Edition script-based plug-ins
Availability Suite uses a host-based data replication facility which replicates data at the file system or logical volume level within the operating system. EMC Symmetrix Remote Data Facility software and Oracle ZFS Storage Appliance software use a storage-based data replication facility which replicates data at the storage system level and provides a transparent service to applications. Oracle Data Guard software and MySQL software are application-based data replication facilities that maintain one or more standby databases as synchronized replicas of a production database.